public static bool CompareExRateIfEqual(ExchangeRate ExRate, int currencyFromId, int currencyToId, int exchangeRateTypeId)
 {
     if (ExRate.CurrencyFromId == currencyFromId && ExRate.CurrencyToId == currencyToId && ExRate.ExchangeRateTypeId == exchangeRateTypeId)
     {
         return true;
     }
     else
     {
         return false;
     }
 }
        public static ExchangeRate CreateExchangeRate(int currencyFromId, int currencyToId, decimal rate, DateTime date, int exchangeRateTypeId)
        {
            ExchangeRate newExchangeRate = new ExchangeRate();
            newExchangeRate.CurrencyFromId = currencyFromId;
            newExchangeRate.CurrencyToId = currencyToId;
            newExchangeRate.Rate = rate;
            newExchangeRate.IsActive = true;
            newExchangeRate.Date = date.Date;
            newExchangeRate.ExchangeRateTypeId = exchangeRateTypeId;

            ObjectContext.ExchangeRates.AddObject(newExchangeRate);
            return newExchangeRate;
        }